Given the new scope here, that says (in part) that
If the question is not looking for an alternative to a product or solution that they have tried, then that question is off-topic on this site. Because a lifehack is an alternative to a solution or product that is unavailable or undesirable, we need to know what product or solution they are trying to work around. Unfortunately, this will probably leave some questions without a site to be asked on, but we simply can not take every question if we expect to have any sort of quality control.
What about a question that asks
I have problem X. I would try solution Y, but I can't because of Z.
Does that Y count as a "solution that they have tried"? ( and, by extension, would a well-formulated Z count as sufficient explanation? )